An alternator is being paralleled with one...

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Question 1 of 205eccefa4bacbc34ba4d48187

An alternator is being paralleled with one already on the line. At the INSTANT the incoming generator circuit breaker is closed, what will happen to the frequency of the incoming alternator?

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5eccefa4bacbc34ba4d48187

An alternator is being paralleled with one already on the line. At the INSTANT the incoming generator circuit breaker is closed, what will happen to the frequency of the incoming alternator?

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🔍 Key Concepts

• Synchronous speed of an alternator connected to a large power system • What happens when you connect (parallel) a smaller generator to a bus with fixed voltage and frequency • The difference between the alternator’s own speed setting and the system frequency once the breaker is closed

💭 Think About

• Before the breaker is closed, can the incoming alternator’s frequency be slightly above or below the bus frequency? Why? • After the breaker is closed, is the alternator free to run at its own frequency, or is it forced to follow the system (bus) frequency? Think of the grid as a very large ‘flywheel’. • Once synchronized and paralleled, what variable can you still control with the alternator’s governor: its frequency, or the share of real power (kW) it takes?

✅ Before You Answer

• Remember that a single small alternator connected to a big power system cannot significantly change the system frequency at the instant of closing. • Distinguish clearly between speed setting/frequency before closing and the actual electrical frequency after closing. • Verify whether the question is asking about the alternator’s own natural tendency or the resulting frequency once it is locked to the bus.

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Question 1 of 205eccefa4bacbc34ba4d48187

An alternator is being paralleled with one already on the line. At the INSTANT the incoming generator circuit breaker is closed, what will happen to the frequency of the incoming alternator?

Back

Question 1 of 20

5eccefa4bacbc34ba4d48187

An alternator is being paralleled with one already on the line. At the INSTANT the incoming generator circuit breaker is closed, what will happen to the frequency of the incoming alternator?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed